.page-about {
  --about-panel-bg: rgba(255, 255, 255, .06);
  --about-hairline: rgba(154, 166, 180, .22);
  padding-top: clamp(20px, 4vw, 40px);
  padding-bottom: clamp(56px, 9vw, 112px);
  color: var(--text);
}

.page-about .section {
  margin-top: clamp(44px, 8vw, 92px);
}

.page-about .rule {
  margin-top: clamp(40px, 7vw, 80px);
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  margin-top: clamp(18px, 3.5vw, 34px);
}

.page-about .about-hero__frame {
  position: relative;
  display: grid;
  gap: clamp(26px, 5vw, 48px);
  padding: clamp(26px, 5.5vw, 56px);
  border: 1px solid var(--line);
  background:
    radial-gradient(120% 90% at 6% 0%, rgba(23, 191, 163, .13), transparent 58%),
    linear-gradient(178deg, rgba(18, 48, 74, .72), rgba(10, 26, 42, .88));
  overflow: hidden;
}

.page-about .about-hero__body {
  min-width: 0;
}

.page-about .about-hero__title {
  margin: 14px 0 0;
  line-height: 1.08;
  letter-spacing: -0.02em;
  text-wrap: balance;
}

.page-about .about-hero__lede {
  margin-top: clamp(16px, 3vw, 24px);
  max-width: 40em;
  color: var(--text);
  opacity: .86;
}

.page-about .about-hero__seal {
  position: relative;
  justify-self: start;
  width: 124px;
  height: 124px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background:
    repeating-conic-gradient(from 0deg, rgba(23, 191, 163, .5) 0deg .9deg, transparent .9deg 12deg);
  flex: none;
}

.page-about .about-hero__seal::after {
  content: "";
  position: absolute;
  inset: 13px;
  border-radius: 50%;
  background: var(--navy);
  border: 1px solid rgba(23, 191, 163, .3);
}

.page-about .about-hero__seal-core {
  position: relative;
  z-index: 1;
  display: grid;
  justify-items: center;
  gap: 2px;
  text-align: center;
}

.page-about .about-hero__seal-ver {
  font-family: var(--font-mono);
  font-size: 1.7rem;
  line-height: 1;
  color: var(--celadon);
  font-variant-numeric: tabular-nums;
}

.page-about .about-hero__seal-cap {
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--scale);
}

.page-about .about-facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(18px, 3vw, 26px) 0 0;
  padding: 0;
  border: 1px solid var(--line);
  background: var(--line);
  list-style: none;
}

.page-about .about-facts__item {
  background: var(--navy-deep);
  padding: 16px 16px 18px;
  min-width: 0;
}

.page-about .about-facts dt {
  font-size: 12.5px;
  line-height: 1.6;
  letter-spacing: .05em;
  color: var(--scale);
}

.page-about .about-facts dd {
  margin: 8px 0 0;
  font-family: var(--font-mono);
  font-size: clamp(1.3rem, 3.4vw, 1.85rem);
  line-height: 1.1;
  color: var(--text);
  font-variant-numeric: tabular-nums;
  word-break: keep-all;
}

/* ---------- 档案的起点 ---------- */

.page-about .about-origin__grid {
  margin-top: clamp(20px, 3.5vw, 32px);
}

.page-about .about-origin__body p {
  margin: 0 0 1.1em;
  color: var(--text);
  opacity: .9;
}

.page-about .about-origin__aside {
  margin-top: 24px;
}

.page-about .about-origin__panel {
  padding: 22px 20px;
  border: 1px solid var(--line);
  background: var(--about-panel-bg);
  backdrop-filter: blur(14px);
}

.page-about .about-origin__panel-title {
  margin: 0 0 14px;
  font-size: 13px;
  letter-spacing: .12em;
  color: var(--amber);
}

.page-about .origin-order {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
  counter-reset: none;
}

.page-about .origin-order li {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 10px;
  align-items: start;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--about-hairline);
}

.page-about .origin-order li:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.page-about .origin-order__n {
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.7;
  color: var(--celadon);
  font-variant-numeric: tabular-nums;
}

.page-about .origin-order__t {
  font-size: 15px;
  line-height: 1.7;
  color: var(--text);
}

/* ---------- 四条团队线 ---------- */

.page-about .team-band {
  list-style: none;
  margin: clamp(22px, 4vw, 34px) 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .team-band__row {
  display: grid;
  gap: 10px;
  padding: 16px 16px 18px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--c);
  background: var(--about-panel-bg);
  backdrop-filter: blur(12px);
  transition: background-color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .team-band__row:hover,
.page-about .team-band__row:focus-visible {
  background: rgba(255, 255, 255, .1);
  border-color: var(--c);
  outline: none;
}

.page-about .team-band__row:focus-visible {
  box-shadow: 0 0 0 2px rgba(23, 191, 163, .5);
}

.page-about .team-band__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
}

.page-about .team-band__name {
  font-size: 15.5px;
  font-weight: 700;
  letter-spacing: .02em;
  color: var(--text);
}

.page-about .team-band__num {
  font-family: var(--font-mono);
  font-size: clamp(1.4rem, 3vw, 1.75rem);
  line-height: 1;
  color: var(--c);
  font-variant-numeric: tabular-nums;
}

.page-about .team-band__track {
  position: relative;
  display: block;
  height: 5px;
  background: rgba(154, 166, 180, .16);
  overflow: hidden;
}

.page-about .team-band__fill {
  display: block;
  height: 100%;
  width: var(--w);
  background: var(--c);
  transition: width var(--scan) var(--ease);
}

.page-about .team-band__duty {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--scale);
}

.page-about .about-team__figure,
.page-about .about-timeline__figure,
.page-about .about-region__figure {
  margin: clamp(22px, 4vw, 32px) 0 0;
}

.page-about .about-team__figure img,
.page-about .about-timeline__figure img,
.page-about .about-region__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--line);
  background: var(--navy-mid);
}

/* ---------- 版本时间轴 ---------- */

.page-about .vtl {
  list-style: none;
  margin: clamp(22px, 4vw, 34px) 0 0;
  padding: 0;
  display: grid;
  gap: 0;
}

.page-about .vtl__item {
  position: relative;
  padding: 0 0 30px 34px;
  border-left: 1px solid var(--line-strong);
}

.page-about .vtl__item:last-child {
  padding-bottom: 0;
  border-left-color: transparent;
}

.page-about .vtl__item::before {
  content: "";
  position: absolute;
  left: -6px;
  top: 7px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--navy);
  border: 1px solid var(--scale);
}

.page-about .vtl__item--current::before {
  background: var(--celadon);
  border-color: var(--celadon);
  box-shadow: 0 0 0 4px rgba(23, 191, 163, .18);
}

.page-about .vtl__ver {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: clamp(1.45rem, 4vw, 2.1rem);
  line-height: 1;
  color: var(--amber);
  letter-spacing: -0.01em;
  font-variant-numeric: tabular-nums;
}

.page-about .vtl__item--current .vtl__ver {
  color: var(--celadon);
}

.page-about .vtl__body {
  margin-top: 10px;
  min-width: 0;
}

.page-about .vtl__body h3 {
  margin: 0 0 8px;
  font-size: 16.5px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--text);
}

.page-about .vtl__body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--scale);
  max-width: 40em;
}

/* ---------- 复核与合规 ---------- */

.page-about .about-audit__grid {
  margin-top: clamp(20px, 3.5vw, 32px);
}

.page-about .about-audit__card {
  padding: 24px 22px;
  color: var(--ink);
}

.page-about .about-audit__label {
  margin: 0;
  font-size: 12.5px;
  letter-spacing: .14em;
  color: var(--graphite);
}

.page-about .about-audit__rule {
  margin: 12px 0 0;
  font-size: 16.5px;
  line-height: 1.75;
  font-weight: 700;
  color: var(--ink);
}

.page-about .about-audit__meta {
  margin: 16px 0 0;
  font-family: var(--font-mono);
  font-size: clamp(1.7rem, 4.5vw, 2.4rem);
  line-height: 1.05;
  color: var(--celadon-deep);
  font-variant-numeric: tabular-nums;
}

.page-about .about-audit__sub {
  margin: 14px 0 0;
  padding-top: 14px;
  border-top: 1px solid rgba(18, 48, 74, .18);
  font-size: 14px;
  line-height: 1.75;
  color: var(--graphite);
}

.page-about .about-audit__certs {
  margin-top: 24px;
}

.page-about .about-audit__certs-title {
  margin: 0 0 14px;
  font-size: 13px;
  letter-spacing: .12em;
  color: var(--amber);
}

.page-about .cert-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .cert {
  padding: 14px 16px;
  border: 1px solid var(--line);
  background: var(--about-panel-bg);
  backdrop-filter: blur(14px);
  cursor: help;
  transition: border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-about .cert:hover,
.page-about .cert:focus-visible {
  border-color: var(--celadon);
  background: rgba(23, 191, 163, .1);
  outline: none;
}

.page-about .cert:focus-visible {
  box-shadow: 0 0 0 2px rgba(23, 191, 163, .45);
}

.page-about .cert__name {
  display: block;
  font-size: 15.5px;
  font-weight: 700;
  letter-spacing: .02em;
  color: var(--text);
}

.page-about .cert__note {
  display: block;
  margin-top: 6px;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--scale);
  opacity: .6;
  max-width: 34em;
  transition: opacity var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-about .cert:hover .cert__note,
.page-about .cert:focus-visible .cert__note {
  opacity: 1;
  color: var(--text);
}

/* ---------- 区域协作 ---------- */

.page-about .about-region__grid {
  margin-top: clamp(20px, 3.5vw, 32px);
}

.page-about .about-region__body p {
  margin: 0 0 1.1em;
  color: var(--text);
  opacity: .9;
}

.page-about .region-list {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  border: 1px solid var(--line);
  background: var(--line);
}

.page-about .region-list__item {
  background: var(--navy-deep);
  padding: 14px 16px 16px;
  min-width: 0;
}

.page-about .region-list__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
}

.page-about .region-list__name {
  font-size: 15.5px;
  font-weight: 700;
  letter-spacing: .06em;
  color: var(--text);
}

.page-about .region-list__n {
  font-family: var(--font-mono);
  font-size: 1.15rem;
  line-height: 1;
  color: var(--celadon);
  font-variant-numeric: tabular-nums;
}

.page-about .region-list__areas {
  margin: 8px 0 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--scale);
}

.page-about .about-region__aside {
  margin-top: 24px;
}

.page-about .about-region__figure {
  margin-top: 0;
}

.page-about .about-region__panel {
  margin-top: 20px;
  padding: 20px;
  border: 1px solid var(--line);
  background: var(--about-panel-bg);
  backdrop-filter: blur(14px);
}

.page-about .about-region__panel-title {
  margin: 0 0 14px;
  font-size: 13px;
  letter-spacing: .12em;
  color: var(--amber);
}

.page-about .region-stats {
  margin: 0;
  display: grid;
  gap: 10px;
}

.page-about .region-stats__item {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--about-hairline);
}

.page-about .region-stats__item:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.page-about .region-stats dt {
  font-size: 14px;
  color: var(--scale);
}

.page-about .region-stats dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 1.2rem;
  line-height: 1;
  color: var(--text);
  font-variant-numeric: tabular-nums;
}

/* ---------- 下一步 ---------- */

.page-about .about-next__frame {
  padding: clamp(26px, 5vw, 52px);
  border: 1px solid var(--line-strong);
  background:
    linear-gradient(120deg, rgba(233, 169, 60, .1), transparent 52%),
    linear-gradient(0deg, rgba(18, 48, 74, .7), rgba(10, 26, 42, .85));
}

.page-about .about-next__frame .h2 {
  margin-top: 12px;
}

.page-about .about-next__frame .lede {
  margin-top: 16px;
  max-width: 42em;
  opacity: .86;
}

.page-about .about-next__links {
  list-style: none;
  margin: clamp(22px, 4vw, 32px) 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .about-next__links .btn {
  display: inline-block;
}

/* ---------- 断点 ---------- */

@media (min-width: 640px) {
  .page-about .about-facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .region-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__frame {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: start;
  }

  .page-about .about-hero__seal {
    justify-self: end;
    margin-top: 6px;
  }

  .page-about .about-origin__aside {
    margin-top: 0;
  }

  .page-about .about-audit__certs {
    margin-top: 0;
  }

  .page-about .about-region__aside {
    margin-top: 0;
  }

  .page-about .vtl__item {
    display: grid;
    grid-template-columns: 108px minmax(0, 1fr);
    gap: 28px;
    padding-left: 44px;
    align-items: start;
  }

  .page-about .vtl__body {
    margin-top: 4px;
  }

  .page-about .cert-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1080px) {
  .page-about .team-band__row {
    grid-template-columns: minmax(0, 1fr);
    padding: 18px 22px 20px;
  }

  .page-about .about-hero__seal {
    width: 148px;
    height: 148px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .team-band__row,
  .page-about .team-band__fill,
  .page-about .cert,
  .page-about .cert__note {
    transition: none;
  }
}
<<<END>>>

.page-about {
  --w: 1rem;
}